qemu-deprecated.texi

   1 @node Deprecated features
   2 @appendix Deprecated features
   3
   4 In general features are intended to be supported indefinitely once
   5 introduced into QEMU. In the event that a feature needs to be removed,
   6 it will be listed in this appendix. The feature will remain functional
   7 for 2 releases prior to actual removal. Deprecated features may also
   8 generate warnings on the console when QEMU starts up, or if activated
   9 via a monitor command, however, this is not a mandatory requirement.
  10
  11 Prior to the 2.10.0 release there was no official policy on how
  12 long features would be deprecated prior to their removal, nor
  13 any documented list of which features were deprecated. Thus
  14 any features deprecated prior to 2.10.0 will be treated as if
  15 they were first deprecated in the 2.10.0 release.
  16
  17 What follows is a list of all features currently marked as
  18 deprecated.
  19
  20 @section Build options
  21
  22 @subsection GTK 2.x
  23
  24 Previously QEMU has supported building against both GTK 2.x
  25 and 3.x series APIs. Support for the GTK 2.x builds will be
  26 discontinued, so maintainers should switch to using GTK 3.x,
  27 which is the default.
  28
  29 @subsection SDL 1.2
  30
  31 Previously QEMU has supported building against both SDL 1.2
  32 and 2.0 series APIs. Support for the SDL 1.2 builds will be
  33 discontinued, so maintainers should switch to using SDL 2.0,
  34 which is the default.
  35
  36 @section System emulator command line arguments
  37
  38 @subsection -no-kvm (since 1.3.0)
  39
  40 The ``-no-kvm'' argument is now a synonym for setting
  41 ``-machine accel=tcg''.
  42
  43 @subsection -vnc tls (since 2.5.0)
  44
  45 The ``-vnc tls'' argument is now a synonym for setting
  46 ``-object tls-creds-anon,id=tls0'' combined with
  47 ``-vnc tls-creds=tls0'
  48
  49 @subsection -vnc x509 (since 2.5.0)
  50
  51 The ``-vnc x509=/path/to/certs'' argument is now a
  52 synonym for setting
  53 ``-object tls-creds-x509,dir=/path/to/certs,id=tls0,verify-peer=no''
  54 combined with ``-vnc tls-creds=tls0'
  55
  56 @subsection -vnc x509verify (since 2.5.0)
  57
  58 The ``-vnc x509verify=/path/to/certs'' argument is now a
  59 synonym for setting
  60 ``-object tls-creds-x509,dir=/path/to/certs,id=tls0,verify-peer=yes''
  61 combined with ``-vnc tls-creds=tls0'
  62
  63 @subsection -tftp (since 2.6.0)
  64
  65 The ``-tftp /some/dir'' argument is replaced by either
  66 ``-netdev user,id=x,tftp=/some/dir '' (for pluggable NICs, accompanied
  67 with ``-device ...,netdev=x''), or ``-nic user,tftp=/some/dir''
  68 (for embedded NICs). The new syntax allows different settings to be
  69 provided per NIC.
  70
  71 @subsection -bootp (since 2.6.0)
  72
  73 The ``-bootp /some/file'' argument is replaced by either
  74 ``-netdev user,id=x,bootp=/some/file '' (for pluggable NICs, accompanied
  75 with ``-device ...,netdev=x''), or ``-nic user,bootp=/some/file''
  76 (for embedded NICs). The new syntax allows different settings to be
  77 provided per NIC.
  78
  79 @subsection -redir (since 2.6.0)
  80
  81 The ``-redir [tcp|udp]:hostport:[guestaddr]:guestport'' argument is
  82 replaced by either
  83 ``-netdev user,id=x,hostfwd=[tcp|udp]:[hostaddr]:hostport-[guestaddr]:guestport''
  84 (for pluggable NICs, accompanied with ``-device ...,netdev=x'') or
  85 ``-nic user,hostfwd=[tcp|udp]:[hostaddr]:hostport-[guestaddr]:guestport''
  86 (for embedded NICs). The new syntax allows different settings to be
  87 provided per NIC.
  88
  89 @subsection -smb (since 2.6.0)
  90
  91 The ``-smb /some/dir'' argument is replaced by either
  92 ``-netdev user,id=x,smb=/some/dir '' (for pluggable NICs, accompanied
  93 with ``-device ...,netdev=x''), or ``-nic user,smb=/some/dir''
  94 (for embedded NICs). The new syntax allows different settings to be
  95 provided per NIC.
  96
  97 @subsection -usbdevice (since 2.10.0)
  98
  99 The ``-usbdevice DEV'' argument is now a synonym for setting
 100 the ``-device usb-DEV'' argument instead. The deprecated syntax
 101 would automatically enable USB support on the machine type.
 102 If using the new syntax, USB support must be explicitly
 103 enabled via the ``-machine usb=on'' argument.
 104
 105 @subsection -nodefconfig (since 2.11.0)
 106
 107 The ``-nodefconfig`` argument is a synonym for ``-no-user-config``.
 108
 109 @subsection -balloon (since 2.12.0)
 110
 111 The @option{--balloon virtio} argument has been superseded by
 112 @option{--device virtio-balloon}.
 113
 114 @subsection -fsdev handle (since 2.12.0)
 115
 116 The ``handle'' fsdev backend does not support symlinks and causes the 9p
 117 filesystem in the guest to fail a fair amount of tests from the PJD POSIX
 118 filesystem test suite. Also it requires the CAP_DAC_READ_SEARCH capability,
 119 which is not the recommended way to run QEMU. This backend should not be
 120 used and it will be removed with no replacement.
 121
 122 @subsection -no-frame (since 2.12.0)
 123
 124 The @code{--no-frame} argument works with SDL 1.2 only. The other user
 125 interfaces never implemented this in the first place. So this will be
 126 removed together with SDL 1.2 support.
 127
 128 @subsection -rtc-td-hack (since 2.12.0)
 129
 130 The @code{-rtc-td-hack} option has been replaced by
 131 @code{-rtc driftfix=slew}.
 132
 133 @subsection -localtime (since 2.12.0)
 134
 135 The @code{-localtime} option has been replaced by @code{-rtc base=localtime}.
 136
 137 @subsection -startdate (since 2.12.0)
 138
 139 The @code{-startdate} option has been replaced by @code{-rtc base=@var{date}}.
 140
 141 @subsection -virtioconsole (since 3.0.0)
 142
 143 Option @option{-virtioconsole} has been replaced by
 144 @option{-device virtconsole}.
 145
 146 @subsection -clock (since 3.0.0)
 147
 148 The @code{-clock} option is ignored since QEMU version 1.7.0. There is no
 149 replacement since it is not needed anymore.
 150
 151 @subsection -enable-hax (since 3.0.0)
 152
 153 The @option{-enable-hax} option has been replaced by @option{-accel hax}.
 154 Both options have been introduced in QEMU version 2.9.0.
 155
 156 @subsection -drive file=json:@{...@{'driver':'file'@}@} (since 3.0)
 157
 158 The 'file' driver for drives is no longer appropriate for character or host
 159 devices and will only accept regular files (S_IFREG). The correct driver
 160 for these file types is 'host_cdrom' or 'host_device' as appropriate.
 161
 162 @section QEMU Machine Protocol (QMP) commands
 163
 164 @subsection block-dirty-bitmap-add "autoload" parameter (since 2.12.0)
 165
 166 "autoload" parameter is now ignored. All bitmaps are automatically loaded
 167 from qcow2 images.
 168
 169 @subsection query-cpus (since 2.12.0)
 170
 171 The ``query-cpus'' command is replaced by the ``query-cpus-fast'' command.
 172
 173 @subsection query-cpus-fast "arch" output member (since 3.0.0)
 174
 175 The ``arch'' output member of the ``query-cpus-fast'' command is
 176 replaced by the ``target'' output member.
 177
 178 @section System emulator devices
 179
 180 @subsection ivshmem (since 2.6.0)
 181
 182 The ``ivshmem'' device type is replaced by either the ``ivshmem-plain''
 183 or ``ivshmem-doorbell`` device types.
 184
 185 @subsection Page size support < 4k for embedded PowerPC CPUs (since 2.12.0)
 186
 187 qemu-system-ppcemb will be removed. qemu-system-ppc (or qemu-system-ppc64)
 188 should be used instead. That means that embedded 4xx PowerPC CPUs will not
 189 support page sizes < 4096 any longer.
 190
 191 @section System emulator machines
 192
 193 @subsection pc-0.10 and pc-0.11 (since 3.0)
 194
 195 These machine types are very old and likely can not be used for live migration
 196 from old QEMU versions anymore. A newer machine type should be used instead.
 197
 198 @subsection prep (PowerPC) (since 3.1)
 199
 200 This machine type uses an unmaintained firmware, broken in lots of ways,
 201 and unable to start post-2004 operating systems. 40p machine type should be
 202 used instead.
 203
 204 @section Device options
 205
 206 @subsection Block device options
 207
 208 @subsubsection "backing": "" (since 2.12.0)
 209
 210 In order to prevent QEMU from automatically opening an image's backing
 211 chain, use ``"backing": null'' instead.
 212
 213 @subsection vio-spapr-device device options
 214
 215 @subsubsection "irq": "" (since 3.0.0)
 216
 217 The ``irq'' property is obsoleted.